/* ===================================
   TAIYO.LOG — Design System & Styles
   "Abstract Dark Aesthetic"
   =================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --bg-deep: #0a0a0a;
  --bg-surface: #141414;
  --bg-elevated: #1e1e1e;
  --bg-hover: #252525;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);
  --text-primary: #e8e8e8;
  --text-secondary: #888888;
  --text-muted: #555555;
  --accent: #c9a96e;
  --accent-dim: #a08550;
  --accent-glow: rgba(201, 169, 110, 0.12);
  --accent-glow-strong: rgba(201, 169, 110, 0.25);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Space Mono', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.8s var(--ease-out);
  --transition-medium: 0.4s var(--ease-out);
  --transition-fast: 0.2s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Film grain noise overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.035;
  z-index: 9999;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* Selection */
::selection {
  background: var(--accent-glow-strong);
  color: var(--text-primary);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}


/* ===================================
   Navigation
   =================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-medium);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 3rem;
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.nav__logo:hover {
  color: var(--accent);
}

.nav__logo span {
  color: var(--accent);
}

.nav__links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav__link {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: var(--transition-medium);
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__link:hover::after {
  width: 100%;
}

/* Mobile menu button */
.nav__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__menu-btn span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: var(--transition-medium);
  transform-origin: center;
}

.nav__menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 5px);
}

.nav__menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.nav__menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -5px);
}


/* ===================================
   Hero Section
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-lg) var(--space-md);
}

/* Radial gold glow behind the image */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Subtle geometric lines in background */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    linear-gradient(135deg, transparent 49.5%, rgba(201, 169, 110, 0.02) 49.5%, rgba(201, 169, 110, 0.02) 50.5%, transparent 50.5%),
    linear-gradient(45deg, transparent 49.5%, rgba(201, 169, 110, 0.015) 49.5%, rgba(201, 169, 110, 0.015) 50.5%, transparent 50.5%);
  background-size: 80px 80px;
  pointer-events: none;
  z-index: 0;
}

.hero__image-wrapper {
  position: relative;
  z-index: 1;
  margin-bottom: 3rem;
}

.hero__image-container {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  box-shadow:
    0 0 0 1px rgba(201, 169, 110, 0.2),
    0 0 60px rgba(201, 169, 110, 0.08),
    0 20px 60px rgba(0, 0, 0, 0.5);
  transition: var(--transition-slow);
}

.hero__image-container:hover {
  box-shadow:
    0 0 0 1px rgba(201, 169, 110, 0.4),
    0 0 100px rgba(201, 169, 110, 0.15),
    0 20px 60px rgba(0, 0, 0, 0.5);
  transform: scale(1.02);
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  filter: saturate(0.85) contrast(1.05);
  transition: var(--transition-slow);
}

.hero__image-container:hover .hero__image {
  filter: saturate(1) contrast(1.1);
  transform: scale(1.05);
}

/* Decorative rotating ring */
.hero__image-ring {
  position: absolute;
  top: -14px;
  left: -14px;
  width: calc(100% + 28px);
  height: calc(100% + 28px);
  border-radius: 50%;
  border: 1px solid rgba(201, 169, 110, 0.12);
  animation: ring-rotate 25s linear infinite;
  pointer-events: none;
}

.hero__image-ring::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent), 0 0 20px rgba(201, 169, 110, 0.3);
}

.hero__image-ring::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(201, 169, 110, 0.5);
  box-shadow: 0 0 6px rgba(201, 169, 110, 0.3);
}

@keyframes ring-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero__content {
  text-align: center;
  z-index: 1;
  max-width: 640px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
  font-weight: 400;
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.9;
  letter-spacing: 0.02em;
}

/* Scroll indicator */
.hero__scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  z-index: 1;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-pulse 2.5s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.2; transform: scaleY(0.6); }
  50% { opacity: 0.8; transform: scaleY(1); }
}

.hero__scroll-text {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
}


/* ===================================
   Section Common
   =================================== */
.section {
  padding: var(--space-xl) var(--space-md);
  max-width: 1100px;
  margin: 0 auto;
}

.section__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section__label::before {
  content: '';
  width: 30px;
  height: 1px;
  background: var(--accent);
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}


/* ===================================
   About Section
   =================================== */
.about {
  border-top: 1px solid var(--border-subtle);
}

.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.about__text {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 2;
  color: var(--text-secondary);
}

.about__text strong {
  color: var(--text-primary);
  font-weight: 500;
}

.about__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.about__detail {
  padding-left: var(--space-md);
  border-left: 1px solid var(--border-subtle);
  transition: var(--transition-medium);
}

.about__detail:hover {
  border-left-color: var(--accent);
}

.about__detail-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.about__detail-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 400;
}


/* ===================================
   Posts Section
   =================================== */
.posts {
  border-top: 1px solid var(--border-subtle);
}

.posts__header {
  margin-bottom: var(--space-md);
}

.posts__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: var(--space-sm);
}

.post-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-medium);
  cursor: pointer;
  position: relative;
}

.post-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-glow) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition-medium);
  z-index: 1;
  pointer-events: none;
}

.post-card:hover {
  transform: translateY(-6px);
  border-color: rgba(201, 169, 110, 0.2);
  box-shadow:
    0 20px 50px rgba(0, 0, 0, 0.4),
    0 0 30px rgba(201, 169, 110, 0.05);
}

.post-card:hover::before {
  opacity: 1;
}

.post-card__thumbnail {
  width: 100%;
  height: 180px;
  position: relative;
  overflow: hidden;
}

.post-card__thumbnail-bg {
  width: 100%;
  height: 100%;
  transition: var(--transition-slow);
}

/* Abstract gradient thumbnails — each card has a unique atmosphere */
.post-card:nth-child(1) .post-card__thumbnail-bg {
  background:
    radial-gradient(ellipse at 30% 50%, rgba(15, 52, 96, 0.6) 0%, transparent 60%),
    linear-gradient(135deg, #0d1117 0%, #161b22 40%, #0f3460 100%);
}

.post-card:nth-child(2) .post-card__thumbnail-bg {
  background:
    radial-gradient(ellipse at 70% 40%, rgba(45, 27, 54, 0.7) 0%, transparent 60%),
    linear-gradient(135deg, #110d17 0%, #2d1b36 40%, #1a0a2e 100%);
}

.post-card:nth-child(3) .post-card__thumbnail-bg {
  background:
    radial-gradient(ellipse at 50% 60%, rgba(60, 46, 10, 0.5) 0%, transparent 60%),
    linear-gradient(135deg, #17140a 0%, #2e2a16 40%, #3d2e0a 100%);
}

.post-card:hover .post-card__thumbnail-bg {
  transform: scale(1.08);
}

.post-card__body {
  padding: 1.5rem;
  position: relative;
  z-index: 2;
}

.post-card__date {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: block;
}

.post-card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.45;
  transition: var(--transition-fast);
}

.post-card:hover .post-card__title {
  color: var(--accent);
}

.post-card__excerpt {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* "View all" link */
.posts__more {
  display: flex;
  justify-content: center;
  margin-top: var(--space-lg);
}

.posts__more-link {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  transition: var(--transition-medium);
  padding: 0.75rem 2rem;
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
}

.posts__more-link:hover {
  color: var(--accent);
  border-color: rgba(201, 169, 110, 0.3);
  background: var(--accent-glow);
}

.posts__more-link svg {
  width: 16px;
  height: 16px;
  transition: var(--transition-medium);
}

.posts__more-link:hover svg {
  transform: translateX(4px);
}


/* ===================================
   Footer
   =================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-lg) var(--space-md);
  margin-top: var(--space-xl);
}

.footer__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 300;
  letter-spacing: 0.05em;
}

.footer__socials {
  display: flex;
  gap: 1.5rem;
}

.footer__social {
  color: var(--text-muted);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer__social:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.footer__social svg {
  width: 18px;
  height: 18px;
}


/* ===================================
   Scroll Reveal Animations
   =================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Hero entrance animations */
.hero__image-wrapper {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 1.2s var(--ease-out), transform 1.2s var(--ease-out);
}

.hero__image-wrapper.loaded {
  opacity: 1;
  transform: scale(1);
}

.hero__content {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 1s var(--ease-out) 0.5s, transform 1s var(--ease-out) 0.5s;
}

.hero__content.loaded {
  opacity: 1;
  transform: translateY(0);
}

.hero__scroll-indicator {
  opacity: 0;
  transition: opacity 1s var(--ease-out) 1.2s;
}

.hero__scroll-indicator.loaded {
  opacity: 1;
}


/* ===================================
   Responsive — Tablet
   =================================== */
@media (max-width: 1024px) {
  .posts__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__content {
    gap: var(--space-md);
  }
}


/* ===================================
   Responsive — Mobile
   =================================== */
@media (max-width: 768px) {
  .nav {
    padding: 1rem 1.5rem;
  }

  .nav.scrolled {
    padding: 0.75rem 1.5rem;
  }

  .nav__links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
  }

  .nav__links.open {
    display: flex;
  }

  .nav__link {
    font-size: 1.2rem;
    letter-spacing: 0.15em;
  }

  .nav__menu-btn {
    display: flex;
    z-index: 1001;
  }

  .hero {
    padding: var(--space-md) var(--space-sm);
    min-height: 100svh;
  }

  .hero__image-container {
    width: 180px;
    height: 180px;
  }

  .hero__image-ring {
    top: -10px;
    left: -10px;
    width: calc(100% + 20px);
    height: calc(100% + 20px);
  }

  .hero::before {
    width: 350px;
    height: 350px;
  }

  .hero__title {
    font-size: clamp(1.6rem, 7vw, 2.5rem);
  }

  .hero__subtitle {
    font-size: 0.9rem;
  }

  .section {
    padding: var(--space-lg) var(--space-sm);
  }

  .about__content {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .posts__grid {
    grid-template-columns: 1fr;
  }

  .post-card__thumbnail {
    height: 150px;
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}